求函数最小正周期解答过程,题:cos^2(x+pai/4)-sin^2(x+pai/4)y=cos^2(x+pai/4)-sin^2(x+pai/4)

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求函数最小正周期解答过程,题:cos^2(x+pai/4)-sin^2(x+pai/4)y=cos^2(x+pai/4)-sin^2(x+pai/4)
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求函数最小正周期解答过程,题:cos^2(x+pai/4)-sin^2(x+pai/4)y=cos^2(x+pai/4)-sin^2(x+pai/4)
求函数最小正周期解答过程,题:cos^2(x+pai/4)-sin^2(x+pai/4)
y=cos^2(x+pai/4)-sin^2(x+pai/4)

求函数最小正周期解答过程,题:cos^2(x+pai/4)-sin^2(x+pai/4)y=cos^2(x+pai/4)-sin^2(x+pai/4)
y=cos^2(x+π4)-sin^2(x+π/4)
= cos{2(x+π/4)}
=cos(2x+π/2)
最小正周期=2π/2=π